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Borussia Dortmund's Ilkay Gundogan suffers injury setback

Borussia Dortmund will be without Ilkay Gundogan for a further month after revealing his back injury has not improved.

Last Updated: 27/08/13 4:19pm

Ilkay Gundogan: Has missed the start of the Bundesliga season

An MRI on Tuesday showed a spinal problem had displayed little sign of progress with Dortmund team doctor Markus Braun telling the club's official website the player must now undergo an "expected rehabilitation period of a month".

Gundogan has not played since being substituted in Germany's 3-3 draw with Paraguay on August 14 when the injury flared up.

Although a key player for coach Jurgen Klopp, Dortmund have not missed the energetic 22-year-old the last couple of weeks with the Champions League runners-up maintaining their 100 per cent start to the new Bundesliga season with wins over Eintracht Braunschweig and Werder Bremen.